Buffet Crampon Moennig Clarinet Barrels Bb - 66 mm Grenadilla wood / Metal rings / Reverse taper bore. Grenadilla wood with metal rings Developed by Hans Moennig, the unique hourglass shaped bore of the Moennig clarinet barrel allows for improved tonal focus and intonation Made from Grenadilla wood with metal rings, the Moennig barrel is the first choice among Buffet players Developed by Hans Moennig, the unique hourglass shaped bore of the Moennig clarinet barrel allows for improved tonal focus and intonation